Electric annunciator



2 seetsheet 1.

Patellteanec. 4, 1888.

11. HAPPBRSBBRGER ELECTRIC ANNUNGIATOR (No Model.)

(No Model.) 2 sheets-sheet 2.

F. HAPPERSBERGER.

ELECTRIC ANNUNCIATOR.

No. 289,411. Patented Dee. 4, 1.883.

cated in the central oflice.

UNITED Srafrns PATENT Oratori,

FREDRIOK IIAPPERSBERGER, OF MADISON, INDIANA.

ELECTRIC ANNUNclAToR; i

SPECIFICATION forming part of LettersV Patent No. 289,411, dated December 4l, 1883.

Application filed May 12, 1883. (No model.)

To @Z5 whom, t may concern:

Be it known that I, FREDRIOK HAPPERs- BERGER, of Madison, in J effersonl county and State of Indiana, have invented certain new and useful Improvements in' Electric Annunciators, of which the following is a specication.

My invention is designed to furnish means for transmitting and making a call from various points to one point or place.

My invention is applicable to hotels, offices, private houses, and the like.

- I am aware that electric annunciators have been used; but `the mechanism employed is more or less complicated, and therefore liable to get out of order and Work imperfectly, and my invention simplifies this mechanism and insures a perfect and certain working of the device.

Referring to the drawings forming part of this specification, Figure l represents the drops and their immediate connections," which are preferably placed in an appropriate case lo- Fig. 2 represents the call-bell, which is usually connected to the case or at some other convenient point in the central office. Fig. 3 represents the call-buttons, one of which is placed in each room or other place from which it is desired to call the central oflice; but, for convenience of illustration, I have shown them near to the annunciator. Fig. 4 represents the battery, which may be located at any convenient point. Fig. 5 is a side view of one of the drops and its operating mechanism. Fig. 6 is a detail view of the mechanism for reversing the position of the drop after a call has been made.

A is the base, to which the number-disks A and their operating mechanism are connected. rIhese drops are each operated independently of the other.

The connection of the various drops to the base A is as follows: For each drop a plate, c, preferably of brass, is Asecuredrto thebase A, and to this plate is secured a magnetic coil, B, a core, b, passing through thecoil and being secured at one end to the plate a, and to the other end of` this core Z) is secured a bracket, C, preferablyby a setscrew, b2, as shown, also preferably of brass, and the upper end of this bracket extends above the coil B. rIhe lower end, b, of this bracket is a little wider than the diameterof the core b, and is bent at an angle to the remainder of the bracket, and lies a little below and parallel to the core b, the purpose of which will be hereinafter explained. Between the upper end of the bracket C and the plate a is a light shaft, GQ lying parrotate.

rIlie preferred mode in which the shaft C is enabled to rotate is as-follows: The ends of the shafts are pointed, and one end of the shaft is seated in a recess in the plate c, and the `other end is seated in a recess in bracket C.

tion of the shaft entering said recess to enable `said shafts to rotate easily therein. Near the outer end of this shaft C', and directly over the outer end of the core b, is secured an angular or curved permanent magnet, D, consisting of the arms d d. One of these arms is positively and the other negatively magnetized. In the present instance the arm d is positively and the arm d negatively magnetized. To this magnet is connected in any appropriate manner the disk or plate or indicator A', which beats the word, number, letter, .or other sign or symbol which indicates the room or place from which the call comes.

A preferred means of connecting the index A! to the magnet D is a short pin or standard, c. In case the indicating word,` letter, or character is fixed` in a stationary manner near to but separate from the index A', the latter may consist of a mere index-pointer, which, when the drop is operated by a call,will point to the said word, letter, or character indicating whence the call comes. a

The arms d d of the magnet D are long enough so that when either end is brought toward the core Z of the coil B it will strike against one edge of the portion bof thebracket C, which 'portion being, as before stated, slightly wider than the diameter of the core b, the arm of the magnet cannot come quite in contactwith the core.

E is any suitable battery by which the elecpole of this battery is connected a wire, l?, and

allel to the length of the coil B, and free to Each recess is sufficiently` larger than the portric current Vis generated, and to the positive' IOO when a bell is used this wire passes to the coil ofthe bell-ringing mechanism, and after passing through this coil gives off a branch, p, to each of the coils B of the drop-operating mechanism, which branch is connected to the outer end of the coil-wire, and each core, by being` thus connected to the positive pole of the battery, becomes negatively magnetized when the circuit is closed by pressing one of the call-buttons, each of which call-buttons is connected to a branch, n, of the wire N, which latter wire is connected to the negative pole of the battery, a Wire, P, leading from each of these buttons to one of the coils B, and being connected to its inner end.

The operation of this feature of my invention is as follows: Supposing the indicators A to be not indicating, in which event they will occupy the position of the indicators l, 3, 4, and 5, the negative. arm d of the magnet D being nearest to the coil B. Suppose,now, that the person in roomy or place N o. 2 desires to call the central office, he presses on the pushbutton in his room, thus forming a complete current, and the electric current passes through the coils ofthe N o'. 2 drop, and, in the present instance, also passes through the coils of the alarm-bell. The instant the circuit is connected the core of the coil B belonging to the No. 2 indicator becomes negatively magnet- "ized, and the negative arm-d' of the magnet D is thus repelled from the core and the positive arm d is attracted toward it, and the. indicator is thus turned over to the position occupied by the N o. 2 indicator in Fig. 1, and this indicator will thus point out that. the call comes from the room or place designated by No. 2. It will thus be seen that there is a double action on the magnet D-that of repulsion of one arm and attraction ofthe otherso that the movement of the indicator is always certain. The circuit which causes the desired number to be indicated also causes the bell to ring, as the wirefro` 'm the battery passes through the coil of the 'ringing mechanism. If desired, however, the bell may be omitted, in which event the positive wire from the battery will pass directly to the drop.- operating coils. In this way any one of the numbers on the annunciator may bey indicated by pressing on the button to which its coil is connected.

Various forms of mechanism may be employed for carrying the magnets D and their respective indicators back to the position they occupy when the indicators arek not indicating. A preferred form is that shown in the drawmgs. y

For each vertical row of indicators asliding rod, E, is provided, each of which is connected to the base A in such a manner that it may slide up and down, and the lower ends of these barsl are connected to one common cross-bar, E, in order that they may all be moved in unison. A handle, F, is connected to the crossbar E', by which it and the bars E may be depressed, the amount of depression being limited bya pin or stop, f, on the base A, against which stop the cross-bar E strikes.

To the upper end of one ofthe bars Eis connected one end of a spring, G, theother end of which is connected to the base A, and this spring, when the handle F is released, will lift the bars E. These bars slide in suitable guideways, as t, one of which is preferably located near the lower end of the bars and the other near the upper ends of said bars. (See Figs 1 and 6.) These rods E are provided with ingers g, one of such lingers being provided for each magnet D, and these ngers extend forward, and are so shaped that when the bars E are depressed they will strike the arms d of the magnets, when the latter, with their indicators, are tov be moved back to the position occupied when the indicators are not indicating. When these arms E are depressed, the fingers g will strike the arms d of the magnets, to which are connected the indicators--as, for instance, the No. 2 and No. 6 disks-and this will cause these magnets to be turned on their axes C', and the position of these indicators will thus be reversed.

I have illustrated my invention by supposing the wire P to be connected to the positive pole of the battery and wire N to the negative pole thereof. Obviously the wire P may be connected to the negative pole of the battery and the wire N be connected to the positive pole of the battery, in which event the movement of the magnets D and their indicators will be reversed, the arm d of the magnet be negative, and the arm d be positive. Obviously, also, the bell may be connected to the wire P between the battery and the branches p, or to the wire N between the battery and branches n, whether the wire P is connected to the positive pole of the battery and the wirev N to the negative pole, or vice versa.

From the above description it will be seen that my invention very materially simplifies IOO IIO

the construction of this class of annunciators,

and that its operation is positive and certain.

It will be observed that in an annunciator made according to my invention the arm or arms el of the permanent magnet D are arranged to act directly with the core b of the magnet. This mode of action and of receiving and transmitting the electric im pulses enables a battery to exert a much greater and more effective power than it can where the arms of the permanent magnet D act directly upon and in conjunction with the periphery of the magnetic coil, as is the case with those annunciators heretofore made; hence by my invention a battery with fewer cells is required to operate a given number of permanent magnets than is required to operate such number of permanent magnets whose arms act directly in conjunction with the periphery ofthe magnetic coil.

One arm of the magnet D may be omitted 5 but for obvious reasons I prefer to retain both arms d d.

What I claim as new and of my invention, and desire to secure by Letters Patent, is as follows: i y

y 1. Incombinationwithbracket C, supported on the core b of the electro-magnetic coil, and provided with piece b', the oscillating magnet D, Whose arm d is arranged toimpinge against said piece b', substantiallyas and for the purposes specied.`

2. rIhe combination ofthe core b, bracket C, set-screw b2, and oscillating magnet, substantially as and for the purposes specified.

3. In an electric annunoiator, the combination of core b, bracket C, set-screwr b2, shaft C', and oscillating magnet D, substantially as and for thepurposes specied.

one piece with said bracket, substantially as and for the purposes specified.

FREDRICK HAPPERSBERGER. Attest:

J. WM. STREHLI, MILTON HILL. 

